| 摘要 |
A method and apparatus (10) for automatically installing in tandem pairs of protective covers to adjacent corners of a rectangular picture frame, to protect the corners during shipment, includes a pair of installation mechanisms (20) oriented at ninety degrees with respect to one another. When both adjacent corners of a frame have been fully inserted into and correctly oriented with respect to the installation mechanisms, sensors (160) within each mechanism produce a command signal which initiates simultaneous automatic operation of both installation mechanisms, each of which includes a feeder (60) that loads an individual pre-cut cardboard preform (40) into position in each mechanism. Each mechanism includes flap folder arms (121) which fit into worktable recesses (119), and which bend preform flaps (41) (42) (47) (50) and (51) to overlie adjacent members of a picture frame, and a pneumatic stapler gun (91) which inserts a staple downwardly through a right-triangular cover flap into a securement flap of the preform and a frame member, securing a separate folded corner protector over each frame corner.
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